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Many of the lenses released for the Canon R mount have an automatic or semi-automatic diaphragm. These are distinguished by the name of the lens: "Super-Canomatic R" lenses are equipped with an automatic diaphragm, while "Canomatic R" lenses have a semi-automatic diaphragm, and a "Canon Lens R" has either a manual preset or manual diaphgram.
The revolutionary Nikon F, shown in black finish with standard, non-metering pentaprism and a 50mm f/1.4 7-element auto Nikkor lens attached. This and other auto Nikkor lenses standardized mostly on the 52mm front filter thread while some other large lenses used a large 72mm filter thread-size.
The Minolta SR-mount was the bayonet mounting system used in all 35 mm SLR cameras made by Minolta with interchangeable manual focusing lenses. Several iterations of the mounting were produced over the decades, and as a result, the mount itself was sometimes referred to by the name of the corresponding lens generation (f.e. "MC", "MD" or "X-600") instead.
Nine-blade iris Pentacon 2.8/135 lens with 15-blade iris Aperture mechanism of Canon 50mm f/1.8 II lens, with five blades In the human eye, the iris (light brown) acts as the diaphragm and continuously constricts and dilates its aperture (the pupil) A 750nm titanium-sapphire laser beam passing through an iris diaphragm, while opening and closing the iris.
The first Minolta SLRs were marketed with SR- model numbers starting from 1958 with the Minolta SR-2, which featured semi-automatic diaphragm operation with Auto-Rokkor lenses: winding the film advance lever opened the diaphragm and cocked the shutter; when the shutter was released, the iris would stop down to the selected aperture.
Since 2008, manufacturers have offered DSLRs which offer a movie mode capable of recording high definition motion video. A DSLR with this feature is often known as an HDSLR or DSLR video shooter. [34] The first DSLR introduced with an HD movie mode, the Nikon D90, captures video at 720p24 (1280x720 resolution at 24 frame/s). Other early HDSLRs ...
The Yashica Pentamatic, an advanced, modern 35 mm Single Lens Reflex (SLR) camera with a proprietary bayonet-mount, automatic diaphragm (offered only with the Auto Yashinon 50mm/1.8 lens), and interchangeable lenses, was introduced in 1959. As before, Yashica continued to source its lenses from the Tomioka Optical factory.
Canon FX with FL 50mm f/1.8. Canon FL refers to a lens mount standard for 35mm single-lens reflex cameras from Canon.It was introduced in April 1964 with the Canon FX camera, replacing the previous Canon R lens mount.